<!--
 * @Author: WangGuojian 1085844536@qq.com
 * @Date: 2023-08-09 18:37:46
 * @LastEditTime: 2023-08-11 19:47:27
 * @LastEditors: WangGuojian 1085844536@qq.com
 * @FilePath: \vue-basic\12-列表渲染\5.更新时的一个问题.html
 * @Description:
-->
<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8" />
        <meta name="viewport" content="width=device-width, initial-scale=1.0" />
        <title>更新时的一个问题</title>
        <script type="text/javascript" src="../js/vue.js"></script>
    </head>
    <body>
        <div id="root">
            <!-- 遍历数组 -->
            <h2>人员列表</h2>
            <button @click="updateMei">更新马冬梅的信息</button>
            <ul>
                <li v-for="(p,index) of persons" :key="index">
                    {{ p.name }}-{{ p.age }}-{{ p.sex}}
                </li>
            </ul>
        </div>
    </body>

    <script type="text/javascript">
        Vue.config.productionTip = false;

        // 用computed实现
        new Vue({
            el: '#root',
            data: {
                keyWord: '',
                persons: [
                    { id: '001', name: '马冬梅', age: 30, sex: '女' },
                    { id: '002', name: '周冬雨', age: 31, sex: '女' },
                    { id: '003', name: '周杰伦', age: 18, sex: '男' },
                    { id: '004', name: '温兆伦', age: 19, sex: '男' },
                ],
            },
            methods: {
                updateMei() {
                    // this.persons[0].name = '马老师'; // 奏效
                    // this.persons[1].age = 50; // 奏效
                    // this.persons[2].name = '男'; // 奏效
                    // this.persons[0] = {
                    //     id: '001',
                    //     name: '马老师',
                    //     age: 50,
                    //     sex: '男',
                    // }; // 不奏效

                    this.persons.splice(0, 1, {
                        id: '001',
                        name: '马老师',
                        age: 50,
                        sex: '男',
                    });
                },
            },
        });
    </script>
</html>
